Pump sealing means



y 1938- w. F. MACDONALD. 2,118,681

' PUMP snub me" MEANS Filed June 4, 1935 INVENTOR Mun, i. M BY ATTORNEY5 Patented May 24, 1938 g p anneal rn sumo Means William it. Macdonaid, Bridgeport, Bonn, assignor, by memo assignments, to Bridgeport Thermostat Company, lino, Bridgeport, @onln, a corporation oi Delaware Application dune 4i, i935, Serial No. tdddli d @laims. (El. llllt- -llll) This invention relates to pumps provided with cylindrical portion it which is concentric with sealing means for preventing the escape ol? liquid the socket 2t. Adjacent the annular portion lid, from the pumping chamber around the driving the cylindrical portion it has a shoulder 32 and shaft. a reduced portion dd to receive a portioh oi the in the pumps now in use there is always diflisealing member later to be described. The per '5 culty with preventing water leakage around the tion it is bent at right angles to form arms it driving shaft. Especially is this true with water which are substantially in the same plane as the pumps used for circulating water in the cooling bottom of the socket it. At the outer ends oi system of automobiles. It is necessary to have the arms 36 are the vanes 38 bent at right angles the pump shaft sealed or there will be a loss of to the arms 36, the vanes it being substantially lo cooling medium. Also in winter if the shaft is in line with the axis of the socket it of the imnot properly sealed, there is a loss of anti-freeze peller it. The arms it and the vanes it are pro solution. in the present devices packing glands vided with ribs it which form reinforcing mem are used which become worn and which must be bers for the arms and the vanes. As before replaced or tightened to prevent leakage. stated, the pump impeller is secured to the shaft '15 An object of thlslnvention is to overcome the it by the pin 22, and as the shaft lt'rotates, the

defects and difliculties present in the pumps now impeller M will be rotated to cause pumping of in use and to provide a sealing means for liquid the liquid contained within the pump housing it. pump shafts which will prevent the escape of In order to prevent the liquid from leaving the liquid from the pump casing and which after it is pump housing ill and escaping therefrom around '20 once installed does not need any adjustment or shaft it I have provided the following construerepair for an indefinite period. l tion. The pump housing it is provided with a in the drawing: fixed collar or annular projection t t adjacent the Figure i represents a vertical, transverse cross hearing it. Between the collar or projection t l 5 section of a pump and pump housing; and the annular portion it of the pumping im- 5 Figure 2 represents a view in elevation of the peller, is positioned a resilient extensible and pumping and sealing unit; and contractible member provided with an annular li'igure 3 represents an elevation of the impeller. bearing member M which surrounds the shaft it Referring now to the drawing, the reference and bears against the collar or projection As '1.) character ill deslanatesa pump housing having a the extensible and contractihle member ll '39 closure plate i2 secured to the pump housing so prefer to use a flexible metallic bellows which as. to form a water tight joint. The plate may functions as abellows seal for the shaft it. This be secured to the housing by the bolts it or in resilient and flexible member it at its one end any suitable manner. A gasket or packing it is is provided with a flange portion M which is spun :2 provided between the plate l2 and the housing ill. over the flange 52 on the annular hearing mem- 3s This'housing may iorm part or an engine for an her at 5i to secure the bellows member it to the automobile. or may be made separate and atbearing member id, fire other end of resilient tached to the engine. Rotatablymounted in and member to has a flange or sleeve portion lid extending into the pump housing ill is a shaft it which fits the reduced portion 34 of the cylinto which may be rotated in the usual manner by a ri portion at of th impeller, Th flange l0 p y which may be rctflted by the engine or sleeve portion 55 is soldered or otherwiseseby means a belt; gearing or m any suitable curely attached and sealed to the impeller in this manner. The hear ng it is provided for the way? shaft it. It is to be noted that the shaft 16 does 4 a be e f not extend through the closure plate l2. The bearing member a m y mad 0 tall-ic or of. non-metallic bearing material. I! the 45 Secured tothe end 20 of the shaft I6 by means l of the pin 22 is a pump impeller at As sho bearing material is metal, the resilient member 46 is soldered or otherwise secured thereto and .ln the drawing, the impeller is formed from a Single piece of metal The impeller 24 15 the flange then spun over as at 54. If the so vided with the cosed socket 25 into which the bearing member is mu-metallic material' e an of t shaft s fits, Extending fr and the bellows member or resilient member 46 is formed integrally with the socket 26 is the ancemented thereto and e fl e 50 h n spun nular portion 2a which is bent at right angles to v as t For a non-metallic b a n mathe socket 26. Beyond the annular portion 28 terial I may use moulded material similar to 56 the pump impeller is bent back to form the Bakelite. when such material is used. I employ cement to attach -the flange III of the flexible sealing member 40 to the bearing member 48.

Positioned within the resilient and flexible sealing member 46 is a spring 58, one end of which bears against the annular portion 20 of the pumping impeller and the other end of which bears against the annular bearing member 48. This spring it functions to expand the flexible sealing member 48 and.to keep the bearing member 4| -in sealing engagement with the collar 44 of the pump housing and to prevent the leakage of any liquid from the pumping chamber past the shaft I. The spring is of sufficient strength to keep the parts sealed. while I have shown the spring 56 as a coil spring, I may substitute other forms of springs therefor.

From an inspection of Fig. 2 it will be apparent that the pump and sealing member are a unit which may be sold as such.

From the above description it is believed that the operation of the device will be obvious but the operation will be briefly given. The shaft i6 is rotated by the pulley H, or gearing or the like. Because the shaft I6 is connected to the pumping impeller 24 by the pin 22, rotation of the shaft It will cause rotation of the pumping impeller. The resilient and flexible sealing member 46 is flxedly attached to the pumping impeller at 34 and 85 and also to the annular bearing member 44 at ill and I4'so that rotation of the impeller 24 will also cause rotation of the resilient and flexible sealing member 48, the bearing member 48 and the spring I. Rotation of the impeller will cause pumping of the liquid in the pumping chamber but due to the sealing arrangement, no liquid will escape past the shaft it.

In view of the above description it will be seen that I have set forth an extremely simple and effective pump sealing structure which will last indefinitely.

What I claim is:

1. An impeller made of sheet metal and shaped to include a closed ended socket having an open mouth adapted to receive the end of a shaft, an annular flange portion at said mouth extending at right angles to the circumferential wall of said socket, a cylindrical portion concentric with said socket and connected with the annular flange portion, and a radially extending portion carrying impeller vanes and connected to said cylindrical portion.

2. An impeller made of sheet metal and provided with a closed shaft receiving socket and having an annular bent-back portion concentric with said socket and connected with the same. said impeller being also provided with a radially extending portion carrying impeller vanes and connected with said annular portion, a resilient and flexible corrugated sealing member provided with a flange at one end fixedly secured to said annular portion of said impeller, an annular bearing member secured to the other end of said resilient and corrugated sealing member, and a spring within said resilient and flexible corrugated member bearing against said impeller and said annular bearing member, said impeller, sealing member, bearing member and spring constituting a unitary replacement unit for use in a pump adapted to be unitarily mounted upon or removed from a pump shaft.

3. An impeller made of sheet metal and shaped to include a closed ended socket having an open mouth adapted to receive the end of a shaft, an annular flange portion at said mouth extending at right angles to the circumferential wall of said socket and connected therewith, a cylindrical portion concentric with said socket and connected with the annular flange, a radially extending portion carrying impeller vanes and connected to said cylindrical portion, a flexible metallic corrugated sealing member having an annular flange at one end thereof soldered to said cylindrical portion, an annular bearing member mounted at the opposite end of said sealing member, and a spring mounted in said sealing member whose opposite ends bear respectively against said annular flange portion of said impeller and said annular bearing member, said impeller, sealing member, bearing member and spring constituting a unitary replacement unit for pumps adapted to be removably mounted on a pump shaft.

4. An impeller made of sheet metal and shaped to provide a closed socket adapted to receive an end of a shaft, an annular flange portion extending at right angles to the circumferential wall of said socket and connected therewith, a second bent-back portion extending at right angles to said first-named annular flange portion concentric with said circumferential wall and connected to the annular flange portion, a radially extending portion carrying impeller vanes and connected with said bent-back portion, a resilient and flexible corrugated sealing member having an annular flange at one end fixedly secured to said bentback portion of said impeller, an annular bearing a member secured to the other end of said resilient and flexible corrugated sealing member, and a spring within said flexible corrugated sealing member whose opposite ends bear respectively against the inner face of said annular bearing member and said annular flange portion of said impeller, said impeller, sealing member, bearing member and spring constituting a unitary replacement unit for pumps adapted to be removably mounted on a pump shaft.

WILLIAM F. MACDONALD. 

